asphaltene

(redirected from Asphaltenes)
Also found in: Wikipedia.

asphaltene

[a′sfȯl‚tēn]
(materials)
Any of the dark, solid constituents of crude oils and other bitumens which are soluble in carbon disulfide but insoluble in paraffin naphthas; they hold most of the organic constituents of bitumens.
References in periodicals archive ?
It was proved in [6] that distribution of aliphatic and aromatic hydrocarbons, hetero-compounds and asphaltenes was affected by polarity of solvents.
But when the temperature gets above 350 degrees, the high-molecular-weight hydrocarbons, the resins and asphaltenes, undergo a series of cracking and condensation reactions to form solid char, similar to the petroleum coke produced in refineries.
Select products within the ParaFlow line of products are migratory and will help keep paraffin wax and asphaltenes in suspension from wellhead to refinery and can also lower the B.
High viscosity and density of EVO, small density difference between oil and water, a high degree of the aqueous phase dispersion, high content of resins and asphaltenes in the oil, which are natural stabilizers, make the EVO emulsion highly resistant to destruction.
Anomalies of holmium (Ho) in the REE composition of asphaltenes (Fig.
As a consequence, oxidation hardening of BIT is observed; polar compounds react and covert to asphaltenes.
The study results have showed that the amount of asphaltenes in bitumen changes insignificantly, some accumulation of aromatic hydrocarbons occurs (Fig.
The chemical composition of bitumen is extremely complex; therefore, when conducting experimental investigations it is divided into two main fractions called asphaltenes and maltenes.
Routine pigging also removes contaminants associated with wet gas, including paraffin, asphaltenes, iron oxides, water, hydrogen sulfide and carbon dioxide.
high tendency to coke), high asphaltenes, sulphur and heavy metal content (Weissman, et al.
A possibility could be a near borehole build up of asphaltenes inhibiting flow.